Lens barrel and imaging apparatus

Abstract

To provide a lens barrel capable of stably energizing a lens holding frame.SOLUTION: A lens barrel includes: a lens holding frame which holds a lens, is movable in a direction along an optical axis of the lens with respect to a fixed member, and has a first abutting part and a second abutting part; a first guide member which supports the lens holding frame in an advancing / retreating manner in the direction along the optical axis and abuts on the first abutting part; a second guide member which supports the lens holding frame in an advancing / retreating manner in the direction along the optical axis and abuts on the second abutting part; and an energizing member which allows the second abutting part and the second guide member to abut on each other by generating an energizing force. The energizing member is an electromagnet held by the lens holding frame and including a first coil.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a lens barrel and an imaging device. [Background technology]

[0002] Conventionally, lens barrels used in optical devices such as video cameras are equipped with a lens drive device that moves the lens in the optical axis direction (direction along the optical axis) to enable zooming and focusing. A lens holding frame that holds the lens is abutted by a guide member so as to be movable in the optical axis direction, and a stable balance is achieved by the biasing force of the lens holding frame's own weight acting on the guide member. Hereinafter, this biasing force on the guide member due to the lens holding frame's own weight will be referred to as the "weight biasing force."

[0003] The guide member is composed of a first guide member inserted into a cylindrical sleeve provided on the lens holder frame and a second guide member abutting against a rotation restricting portion that restricts rotation of the lens holder frame in the direction of rotation around the first guide member in a plane perpendicular to the optical axis. In such a lens driving device, the center of gravity on which the lens holder frame's own weight is applied is located between the first guide member and the second guide member in a plane perpendicular to the optical axis, so when the position changes, the biasing force of the lens holder frame's own weight changes. This prevents the lens holder frame from being stably balanced, and there is a possibility that rattle may occur between the lens holder frame and the guide member.

[0004] Patent Document 1 proposes a lens drive device that is advantageous for preventing rattles caused by changes in position between the lens holding frame and the guide member. In this Patent Document 1, a magnet is integrally held in the rotation restriction portion of the lens holding frame, and the second guide member that abuts against the rotation restriction portion is made of a magnetic material. In Patent Document 1, a magnetic attraction force is generated between the magnet and the second guide member in a direction perpendicular to the optical axis, and a magnetic biasing force is applied to the rotation restriction portion, so that rattles can be eliminated between the lens holding frame and the second guide member even when the position changes. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-15799 Summary of the Invention [Problem to be solved by the invention]

[0006] However, with the configuration of Patent Document 1, the magnetic biasing force on the rotation restricting portion is always constant, and when the attitude of the lens drive device changes, the weight biasing force of the lens holder frame changes, so the total biasing force of the magnetic biasing force and the weight biasing force changes depending on the attitude. This changes the total biasing force, causing the load on the rotation restricting portion to fluctuate, which may make it difficult to bias the lens holder frame stably.

[0007] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a lens barrel that has a simple structure and is capable of stably biasing a lens holding frame. [Means for solving the problem]

[0008] In order to achieve the above object, one aspect of the present invention provides a lens barrel comprising: a lens holding frame that holds a lens, is movable relative to a fixed member in a direction along the optical axis of the lens, and has a first abutment portion and a second abutment portion; a first guide member that supports the lens holding frame so that it can move back and forth in the direction along the optical axis and abuts against the first abutment portion; a second guide member that supports the lens holding frame so that it can move back and forth in the direction along the optical axis and abuts against the second abutment portion; and a biasing member that generates a biasing force to bring the second abutment portion and the second guide member into abutment, wherein the biasing member is an electromagnet including a first coil held by the lens holding frame. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a lens barrel that makes it possible to stably bias a lens holding frame. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a conceptual diagram of an imaging device including a lens barrel and a camera body according to an embodiment. [Figure 2] 1 is a perspective view showing an entire lens driving device according to an embodiment. [Figure 3] FIG. 2 is a perspective view showing the internal configuration of the lens driving device according to the embodiment. [Figure 4] FIG. 2 is a top view showing the periphery of an electromagnet holding portion according to the embodiment. [Figure 5] 4 is a cross-sectional view taken along the line AA in FIG. 3, showing the periphery of the electromagnet holding portion according to the embodiment. [Figure 6] 10A and 10B are diagrams illustrating the biasing force of the lens driving device according to the embodiment on the lens holding frame when the lens driving device is in the normal position. [Figure 7] 10A and 10B are diagrams illustrating a magnetic biasing force applied to a lens holding frame when the attitude of the lens driving device according to the embodiment changes. [Figure 8] 10A and 10B are diagrams illustrating changes in the biasing force acting on the rotation restricting groove when the attitude changes around the optical axis according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In each drawing, the same components or elements are designated by the same reference numerals, and redundant descriptions will be omitted or simplified. In each drawing, the X-axis is taken as the direction toward the subject along the optical axis OA of the lens group, the Y-axis is taken as a specific direction in a plane perpendicular to the X-axis, and the Z-axis is taken as a direction perpendicular to the Y-axis.

[0012] <Embodiment 1> FIG. 1 is a conceptual diagram showing the entire imaging device 3000 according to this embodiment. As shown in FIG. 1, the imaging device 3000 according to this embodiment is configured to include a lens barrel 1000 (lens device) and a camera body 2000. The lens barrel 1000 also includes a built-in lens driving device 100. Note that the configuration of the lens driving device 100 shown in FIG. 1 is merely an example, and the lens driving device 100 according to this embodiment will be described in detail later. Although not shown in FIG. 1 for the sake of simplicity, the lens barrel 1000 is configured to include, for example, a lens, a cam ring, a guide barrel, a zoom ring, an electromagnetic diaphragm unit, and various barrel groups.

[0013] Also, a control board (control unit on the lens barrel side) 110 is arranged inside the lens barrel 1000. The control board 110 is configured as at least one computer including a CPU, memory, etc. The control board 110 is electrically connected to each unit of the lens barrel 1000, thereby controlling each operation (e.g., drive operation) inside the lens barrel 1000. The control board 110 is electrically connected to, for example, a first flexible board 4 and a second flexible board 12, which will be described later, an electromagnetic diaphragm unit (not shown), etc.

[0014] The lens barrel 1000 has a mount 120. The mount 120 is a component fixed to a camera body 2000 that has various components such as an image sensor 200 that captures an image of a subject through an optical element (lens). That is, the mount 120 in the lens barrel 1000 is configured to be attachable to a mount 210 provided on the camera body 2000, and by attaching it to the mount 210 provided on the camera body 2000, it can be communicatively connected to the camera body 2000. This allows the lens barrel 1000 and the camera body 2000 that has the image sensor 200 to form an imaging device 3000. The imaging device 3000 is configured to be able to capture an image formed through the lens barrel 1000. Note that the imaging device 3000 may also be an imaging device in which the lens barrel 1000 and the camera body 2000 are integrated together.

[0015] The image sensor 200 is configured with an image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor). The camera body 2000 also has a control board (camera-side control unit) (not shown). The control board (not shown) is configured as at least one computer including a CPU, memory, etc., and controls the overall operation of the camera body 2000. The control board (not shown) is activated when the camera body 2000 is turned on by operating a power button (not shown) on the camera body 2000. The control board (not shown) is also electrically connected to the control board 110 by electrically connecting the lens barrel 1000 and the camera body 2000 via the respective mounts. The control unit (not shown) of the camera body 2000 may then send and receive control signals corresponding to the operation and processing to and from the control board 110, thereby controlling each operation of the lens barrel 1000.

[0016] 2 is a perspective view showing the entire lens driving device 100 according to this embodiment. The lens driving device 100 has a fixed member made up of a fixed cylinder 1 and a fixed plate 2 that constitute a lens barrel 1000. The lens driving device 100 has a first flexible substrate 4 on which an attitude detection unit 3 is mounted, and the first flexible substrate 4 is fixed to the fixed cylinder 1.

[0017] Fig. 3 is a perspective view showing the internal configuration of the lens driving device 100 according to this embodiment. Fig. 3(A) is a perspective view showing the internal configuration of the lens driving device 100 from the subject direction of the X axis. Fig. 3(B) is a perspective view showing the internal configuration of the lens driving device 100 from the imaging surface direction of the X axis.

[0018] The moving lens group 5 is held by a lens holding frame 6. The moving lens group 5 moves in a direction along the optical axis OA while being held by the lens holding frame 6. The moving lens group 5 may be either a zoom lens or a focus lens.

[0019] Lens holding frame 6 has a sleeve portion (first abutment portion). This sleeve portion is composed of two holes, sleeve hole 6a and sleeve hole 6b. Lens holding frame 6 further has a guide portion formed by extending in the direction of the optical axis OA so as to have a through hole via sleeve hole 6a and sleeve hole 6b. When first guide bar 10 is inserted into this guide portion, first guide bar 10 abuts against sleeve hole 6a and sleeve hole 6b.

[0020] The lens holding frame 6 also has a rotation restriction groove (second abutment portion) 6c with its opening facing outward (toward the outer diameter side). The second guide bar 11 is disposed in this rotation restriction groove 6c. The rotation restriction groove 6c is a groove portion having an opening facing the outer diameter side as described above, and disposing the second guide bar 11 therein restricts movement of the lens holding frame 6 in the direction along the optical axis OA.

[0021] The first guide bar 10 and the second guide bar 11 are fixed by the fixed cylinder 1 and the fixed plate 2 so that they are parallel to the direction along the optical axis OA. Therefore, the movement direction of the lens holding frame 6 is limited to the front-to-rear direction of the optical axis (X-axis direction). In other words, the lens holding frame 6 is supported by the first guide bar 10 and the second guide bar 11 so that it can move back and forth in the direction along the optical axis OA. In other words, the lens holding frame 6 is supported by the first guide bar 10 and the second guide bar 11 so that it cannot move in the radial direction (the direction perpendicular to the optical axis). In this embodiment, the second guide bar 11 is made of a magnetic material in order to act on an electromagnet (biasing member) 13, which will be described later.

[0022] Next, the voice coil motor in this embodiment will be described. The voice coil motor is one of the actuators that moves the lens holding frame 6 back and forth in the direction of the optical axis OA. That is, when the voice coil motor is driven, the lens holding frame 6 moves back and forth in the direction of the optical axis OA. As shown in FIG. 3(B), the voice coil motor is composed of a magnet 7, a yoke 8, and a voice coil (second coil) 9. The yoke 8 is made up of a first yoke 8a and a second yoke 8b. The voice coil 9 is fixed (held) to the lens holding frame 6, and a magnetic circuit section (magnetic circuit element) composed of the magnet 7 and the yoke 8 is fixed (held) to the fixed barrel 1.

[0023] The yoke 8 is configured in a loop shape, and the magnet 7 is disposed inside the loop (on the inner diameter side). A part of the yoke 8 passes through the inside of the annular voice coil 9, and the magnetic flux of the magnet 7 is perpendicular to the axial direction of the voice coil 9, and the yoke 8 forms a closed magnetic path through which the magnetic flux flows.

[0024] The second flexible substrate 12 has a first end 12a, which is one end, connected to the voice coil 9 and an electromagnetic coil 15 (described later), and a second end 12b, which is the other end, connected to the fixed barrel 1. The first end 12a is connected to the voice coil 9 and the electromagnetic coil 15, respectively, by lead wires or the like, as shown in FIG. 3(B), for example. In this manner, the second flexible substrate 12 is connected to the respective components by having the first end 12a connected to the voice coil 9 and the electromagnetic coil 15 and the second end 12b connected to the fixed barrel. The second flexible substrate 12 is fixed to the lens holding frame 6 with the first end 12a connected to the voice coil 9 and the electromagnetic coil, and the second end 12b is fixed to the fixed barrel 1.

[0025] When a current flows through the voice coil 9 via the second flexible substrate 12, a Lorentz force due to the magnetic flux of the magnet 7 acts in the direction of the optical axis OA, and the lens holding frame 6 is subjected to a force in the direction of the optical axis OA. Furthermore, the direction of the Lorentz force can be switched between the front and rear directions of the optical axis OA depending on the direction of current flow through the voice coil 9, so the lens holding frame 6 can move back and forth along the optical axis OA. With this configuration, the lens driving device 100 controls the drive for zooming and focusing operations of the optical system.

[0026] Next, the electromagnet 13 disposed in the vicinity of the rotation restriction groove 6c of the lens holding frame 6 will be described below with reference to Figs. 4 and 5. Fig. 4 is a top view of the periphery of the electromagnet holding portion 6d in the internal configuration of the lens driving device 100 according to this embodiment, as seen from the Y-axis direction (as seen from the +Y direction to the -Y direction). Fig. 5 is a cross-sectional view taken along line AA in Fig. 4, showing the periphery of the electromagnet holding portion 6d according to this embodiment. Fig. 5(A) is a diagram showing a cross-sectional view taken along line AA in Fig. 4, showing the periphery of the holding portion of the electromagnet 13. Fig. 5(B) is a diagram showing the magnetic flux B and the magnetic biasing force Fm when the electromagnet 13 is applied in the state of the cross-sectional view taken along line AA in Fig. 5(A).

[0027] 5, the electromagnet 13 is disposed on the lens holding frame 6 so as to be located above (for example, directly above) the second guide bar 11 and the rotation restriction groove 6c. In other words, the electromagnet 13 is disposed on the lens holding frame 6 so that the center position of the electromagnet 13 is on the outer diameter side (+Y direction side) of the second guide bar 11 and the rotation restriction groove 6c.

[0028] Electromagnet 13 in this embodiment is composed of a drum core (first core member) 14 made of a magnetic material, an electromagnetic coil (first coil) 15 wound around drum core 14, and a ring core (second core member) 16 made of a magnetic material. The biasing force generated by electromagnet 13 in this embodiment changes depending on the attitude of lens barrel 1000.

[0029] The electromagnetic coil 15 is fixed so as to be coupled to the first end 12a of the second flexible substrate 12, thereby electrically connecting to the second flexible substrate 12. The drum core 14 and the ring core 16 are fixed to the electromagnet holding portion 6d of the lens holding frame 6. For example, they are fixed by a fixing means such as an adhesive 17. Note that the adhesive is an example, and they may be fixed by a fixing means other than an adhesive.

[0030] When a current flows through the electromagnetic coil 15 via the second flexible substrate 12, the drum core 14 and the ring core 16 are magnetized. As a result, in the electromagnet 13, a closed magnetic circuit is formed by the drum core 14 and the ring core 16, through which magnetic flux B flows.

[0031] As described above, since second guide bar 11 is made of a magnetic material, when a current flows through electromagnetic coil 15, a magnetic biasing force Fm acts between electromagnet 13 and second guide bar 11 in the direction of second guide bar 11. That is, when a current is applied to electromagnet 13, it can generate a magnetic biasing force. Then, this magnetic biasing force Fm presses rotation restricting groove 6c downward toward second guide bar 11 (biases in one direction), thereby abutting against second guide bar 11 and eliminating backlash.

[0032] 6A and 6B are diagrams showing the biasing force due to the weight mg of the lens holding frame 6 when the lens driving device 100 is in the normal posture. Fig. 6A is a front view as seen from the X-axis direction. Fig. 6B is a side view as seen from the Z-axis direction.

[0033] Due to the weight mg of the lens holder frame 6, a weight biasing force Fa acts on the sleeve hole 6a, a weight biasing force Fb acts on the sleeve hole 6b, and a weight biasing force Fc acts on the rotation restricting groove 6c. This causes the lens holder frame 6 to lean to one side, eliminating play. However, when the posture of the lens drive device 100 changes, the weight biasing force Fc does not act on the rotation restricting groove 6c, and stable balance may not be achieved. In this embodiment, when such a posture change occurs, the magnetic biasing force Fm from the electromagnet 13 is used to eliminate play in the rotation restricting groove 6c.

[0034] Next, we will explain how the electromagnet 13 is controlled when the attitude of the lens driving device 100 changes. Fig. 7 is a front view showing the internal configuration of the lens driving device 100 when it is in an attitude where the biasing force Fc of its own weight is no longer applied to the rotation restricting groove 6c. Fig. 8 is a diagram showing the change in the biasing force acting on the rotation restricting groove 6c when the attitude changes around the optical axis direction (X-axis direction).

[0035] As shown in Fig. 8, when 0 deg on the horizontal axis is the normal attitude (for example, the state shown in Fig. 6), for example, as the attitude around the optical axis is changed (rotation around the X axis), the biasing force Fc due to its own weight gradually changes. Then, at a phase where the center of gravity of the lens holding frame 6 is in the direction of gravity as seen from the first guide bar 10, no rotational torque is generated around the first guide bar 10 due to its own weight (for example, the state shown in Fig. 6). In this attitude, the biasing force Fc due to its own weight is no longer applied.

[0036] Similarly, by changing the orientation around the optical axis perpendicular in the vertical direction (rotating around the Z axis), the self-weight biasing force Fc gradually decreases, and when the lens driving device 100 becomes vertical, the self-weight biasing force Fc is no longer applied.

[0037] An angular velocity sensor is used as the attitude detection unit 3. In this embodiment, the attitude detection unit 3 detects the attitude of the lens barrel 1000. Specifically, the attitude detection unit 3 detects the attitude of the lens driving device 100 arranged inside the lens barrel 1000, and outputs the detected angular velocity signal as attitude information of the lens driving device 100 to the control board 110 of the lens barrel 1000 via the first flexible board 4. Note that the attitude detection unit 3 may also output to the control board on the camera body 2000 side.

[0038] Then, control board 110 controls (adjusts) the current applied to electromagnetic coil 15 of electromagnet 13 based on the attitude information of lens driving device 100 output from attitude detection unit 3, thereby changing magnetic biasing force Fm so as to bring rotation restricting groove 6c into contact with second guide bar 11. In this way, the biasing force of electromagnet 13 in this embodiment changes depending on the attitude of lens barrel 1000. In other words, electromagnet 13 varies the magnetic biasing force based on the attitude detection result by attitude detection unit 3. Then, as described above, control board 110 changes magnetic biasing force Fm depending on the attitude of lens barrel 1000 (lens driving device 100).

[0039] 8, it is possible to apply the magnetic biasing force Fm in response to a decrease in the weight biasing force Fc due to a change in attitude, and to maintain a constant total biasing force Fd, which is the sum of the weight biasing force Fc and the magnetic biasing force Fm. By maintaining a constant total biasing force Fd regardless of the attitude, it is possible to provide a lens barrel 1000 that includes a lens driving device 100 that stably biases the lens holding frame 6, prevents rattle, and improves responsiveness.

[0040] The above-described embodiment is merely a typical example, and various modifications and changes can be made to the above-described embodiment when implementing the present invention.

[0041] The disclosure of this embodiment includes the following configuration.

[0042] (Configuration 1) a lens holding frame that holds a lens, is movable relative to a fixed member in a direction along an optical axis of the lens, and has a first abutment portion and a second abutment portion; a first guide member that supports the lens holding frame so that the lens holding frame can move back and forth in a direction along the optical axis and that abuts against the first abutment portion; a second guide member that supports the lens holding frame so that the lens holding frame can move back and forth in a direction along the optical axis and that abuts against the second abutment portion; a biasing member that generates a biasing force to bring the second contact portion and the second guide member into contact with each other, The lens barrel is characterized in that the biasing member is an electromagnet including a first coil held by the lens holding frame.

[0043] (Configuration 2) 2. The lens barrel according to configuration 1, wherein the biasing force of the biasing member changes depending on the attitude of the lens barrel.

[0044] (Configuration 3) an attitude detection unit that detects the attitude of the lens barrel; 3. The lens barrel according to claim 1, wherein the biasing member varies the biasing force based on the result of attitude detection by the attitude detection unit.

[0045] (Configuration 4) The lens barrel according to configuration 3, further comprising a control unit that changes the biasing force of the biasing member by controlling the current applied to the first coil based on the posture detection result.

[0046] (Configuration 5) 5. The lens barrel according to any one of configurations 1 to 4, wherein the electromagnet generates a magnetic biasing force when a current is applied thereto.

[0047] (Configuration 6) a voice coil motor that drives the lens holding frame so that the lens holding frame can move back and forth in a direction along the optical axis; a flexible substrate; The lens barrel of any one of configurations 1 to 5, wherein the first coil and the second coil of the voice coil motor are connected to a first end, which is an end on one side of the flexible substrate, and the fixing member is connected to a second end, which is an end on the other side.

[0048] (Configuration 7) The lens barrel according to configuration 6, wherein the flexible substrate is held by the lens holding frame with the first coil and the second coil connected to the first end.

[0049] (Configuration 8) the voice coil motor further includes a yoke and a magnet, 8. The lens barrel according to claim 6, wherein a magnetic circuit section formed by the yoke and the magnet is held by the fixing member.

[0050] (Configuration 9) 9. The lens barrel according to any one of configurations 1 to 8, wherein the second guide member is made of a magnetic material.

[0051] (Configuration 10) the second contact portion is a groove portion having an opening facing the outer diameter side, The lens barrel according to any one of configurations 1 to 9, wherein the second guide member is disposed in the groove portion, thereby restricting movement of the lens holding frame in a direction along the optical axis.

[0052] (Configuration 11) the biasing force is a magnetic biasing force generated by applying a current to the electromagnet, the second guide member is made of a magnetic material, The lens barrel of any one of configurations 1 to 4, characterized in that the magnetic force is generated to press the second abutment portion downward toward the second guide member, causing the second abutment portion to abut against the second guide member.

[0053] (Configuration 12) the electromagnet further includes a first core member and a second core member formed of a magnetic material; The lens barrel of any one of configurations 1 to 11, wherein the first coil is wound around the first core member, and the second core member is positioned outward of the first coil when viewed in a plane perpendicular to the optical axis.

[0054] (Configuration 13) 13. The lens barrel according to any one of configurations 1 to 12, wherein the biasing member generates a biasing force in a radial direction to bring the second contact portion and the second guide member into contact with each other.

[0055] (Configuration 14) an image sensor that captures an image of a subject through the lens; and the lens barrel according to any one of configurations 1 to 13. An imaging device characterized by:

[0056] (Configuration 15) The imaging device described in configuration 14, further comprising a control unit that changes the biasing force of the biasing member by controlling the current applied to the first coil based on the posture detection result of the lens barrel. [Explanation of symbols]

[0057] 6 Lens holding frame 6a sleeve hole 6b sleeve hole 6c Rotation restriction groove 10 First guide bar 11 Second guide bar 13 Electromagnet 100 Lens drive device 1000 Lens Barrel

Claims

1. a lens holding frame that holds a lens, is movable relative to a fixed member in a direction along an optical axis of the lens, and has a first abutment portion and a second abutment portion; a first guide member that supports the lens holding frame so that the lens holding frame can move back and forth in a direction along the optical axis and that abuts against the first abutment portion; a second guide member that supports the lens holding frame so that the lens holding frame can move back and forth in a direction along the optical axis and that abuts against the second abutment portion; a biasing member that generates a biasing force to bring the second contact portion and the second guide member into contact with each other, The lens barrel according to claim 1, wherein the biasing member is an electromagnet including a first coil held by the lens holding frame.

2. 2. The lens barrel according to claim 1, wherein the biasing force of the biasing member changes depending on the position of the lens barrel.

3. an attitude detection unit that detects the attitude of the lens barrel; 2. The lens barrel according to claim 1, wherein the biasing member varies the biasing force based on the result of attitude detection by the attitude detection section.

4. 4. The lens barrel according to claim 3, further comprising a control unit that changes the biasing force of the biasing member by controlling the current applied to the first coil based on the attitude detection result.

5. 2. The lens barrel according to claim 1, wherein the electromagnet generates a magnetic biasing force when a current is applied to the electromagnet.

6. a voice coil motor that drives the lens holding frame so that the lens holding frame can move back and forth in a direction along the optical axis; a flexible substrate; 2. The lens barrel according to claim 1, wherein the first coil and the second coil of the voice coil motor are connected to a first end, which is an end on one side of the flexible substrate, and the fixing member is connected to a second end, which is an end on the other side.

7. The lens barrel according to claim 6 , wherein the flexible substrate is held by the lens holding frame with the first coil and the second coil connected to the first end.

8. the voice coil motor further includes a yoke and a magnet, 7. The lens barrel according to claim 6, wherein a magnetic circuit portion formed by the yoke and the magnet is held by the fixing member.

9. 2. The lens barrel according to claim 1, wherein the second guide member is made of a magnetic material.

10. the second contact portion is a groove portion having an opening facing the outer diameter side, 2. The lens barrel according to claim 1, wherein the second guide member is disposed in the groove, thereby restricting movement of the lens holding frame in a direction along the optical axis.

11. the biasing force is a magnetic biasing force generated by applying a current to the electromagnet, the second guide member is made of a magnetic material, The lens barrel according to claim 1, wherein the magnetic force is generated to press the second contact portion downward toward the second guide member, thereby causing the second contact portion to contact the second guide member.

12. the electromagnet further includes a first core member and a second core member formed of a magnetic material; 2. The lens barrel according to claim 1, wherein the first coil is wound around the first core member, and the second core member is positioned outward of the first coil when viewed in a plane perpendicular to the optical axis.

13. 2. The lens barrel according to claim 1, wherein the biasing member generates a biasing force in a radial direction to bring the second contact portion and the second guide member into contact with each other.

14. an image sensor that captures an image of a subject through the lens; and the lens barrel according to any one of claims 1 to 13. An imaging device characterized by:

15. 15. The imaging device according to claim 14, further comprising a control unit that changes the biasing force of the biasing member by controlling the current applied to the first coil based on the posture detection result of the lens barrel.

Images